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POGet previous object id which isn't disabled
 

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  1. POGet previous object id which isn't disabled
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    <p>Dear Stackoverflowers,</p> <p>I got the following object and function, but if i give 0 as parameters it bugs! Please help me out since i have only 1,5 hour left to deliver this.</p> <pre><code>var album = [ { url: 'images/0006787.jpg', landscape: true, description: 'Shadows to the sea...', photographer: 'Sander', date: '12-8-1999' }, { url: 'images/0004713.jpg', description: 'Amsterdam? Utrecht? Die fiets ben je kwijt!', landscape: false }, { url: 'images/0004720.jpg', landscape: false }, { url: 'images/0004731.jpg', landscape: true }, { url: 'images/0004750.jpg', landscape: true }, { url: 'images/0004755.jpg', landscape: true }, { url: 'images/0004801.jpg', landscape: true }, { url: 'images/0004802.jpg', landscape: false }, { url: 'images/0004827.jpg', landscape: false }, { url: 'images/0004853.jpg', landscape: false }, { url: 'images/0004858.jpg', landscape: true }, { url: 'images/0004860.jpg', landscape: true }, { url: 'images/0004870.jpg', landscape: true }, { url: 'images/0004874.jpg', landscape: false }, { url: 'images/0004888.jpg', landscape: true }, { url: 'images/0004902.jpg', landscape: true }, { url: 'images/0004931.jpg', landscape: true }, { url: 'images/0004969.jpg', landscape: true }, { url: 'images/0004971.jpg', landscape: true }, { url: 'images/0006598.jpg', landscape: true }, { url: 'images/0006630.jpg', landscape: true }, { url: 'images/0006638.jpg', landscape: true }, { url: 'images/0006680.jpg', landscape: true }, { url: 'images/0006743.jpg', landscape: true }, { url: 'images/0004681.jpg', landscape: false } ]; </code></pre> <p>The function:</p> <pre><code>function getPrev(currPhotoId) { var i = currPhotoId - 1; i %= album.length; while ( album[i].disabled ) { i--; i %= album.length; } return i; } </code></pre> <p>Now the purpose of this function is that it checks if the previous row has the property disabled, if it does it scans until it finds one without the disabled property.</p> <p>For example getPrev(0) should return last in object in this case. But, if i the last in object to disabled = true, it should scan backwards untill it reaches one without the disabled property</p>
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    1. COAnd in what way does it 'bug'? What's the expected behaviour if you pass `0` as an argument? Why not just use an `if (currPhotoId == 0){/* do something */ } else { /* do normal stuff */}`?
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    2. COWhat is the function suppose to do?
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    3. COWell, the function is suppose to check the previous id in line which is not disabled. I got a function which removes images in the DOM and alters the object. For example i delete picture 3, it makes album[3].disabled = true. So the function checks the next in line which isn't disabled. So if i use this function on number 4 i get back number 2. Now the problem is when i enter 0 i am suppose to get the last in the object (24) in this case, or if its disabled i should get 23.
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      1. USDelano de Rooij
 

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